//import './1.differentType'
//import './2.differentText';
//import './3.differentAttributes';
//import './4.existOldChildren';
//import './5.existNewChildren';
//import './6.directCompare'
//import './7.reuseOldDOM'
//import './8.push'
//import './9.unshift'
//import './10.pop'
//import './11.shift'
//import './12.head2tail'
//import './13.tail2head'
//import './14.random'
import './15.key'